Arthashastra
चतुर् भक्त उपवासी कृष्ण चतुर्दश्यां बलिं कृत्वा शूल प्रोतस्य पुरुषस्य अस्थ्ना कीलकान् कारयेत् ॥
Having fasted for four nights and offered animal sacrifice (bali) on the fourteenth day of the dark half of the month, one should get a few bolt-like pieces prepared from the bone of a man put to the gallows.
english translation
catur bhakta upavAsI kRSNa caturdazyAM baliM kRtvA zUla protasya puruSasya asthnA kIlakAn kArayet ॥
hk transliteration by Sanscript